More Than 100 More AMDGPU DC Patches Line Up Ahead Of Linux 4.15

Written by Michael Larabel in Radeon on 11 October 2017 at 12:25 AM EDT. 23 Comments
AMDGPU DC is expected for Linux 4.15 assuming Linus Torvalds has no objections to merging the code. We hope it won't, but the code-base for this new AMD display code is outright massive at more than 120,000 lines of code over hundreds of patches. Today another 103 new patches were published.

Harry Wentland of AMD today sent out 103 more DC patches of this new display code implementation for the AMDGPU Direct Rendering Manager driver.

Prominent changes include a hang fix for hotplug displays, hotplug not working after S3 suspends, multi-display support for Carrizo, more Raven Ridge APU enablement, updated DML code (described by Harry as a "GCC parseable hardware gospel"), a frame-buffer compression configuration option, corrected audio assignment, and other fixes.

AMDGPU DC is what allows for Raven RX Vega display support, HDMI/DP audio, atomic mode-setting, and other newer display features. Not yet queued are the final bits for FreeSync/AdaptiveSync support.

With these 103 patches, the code-base of DC ends up getting even larger, "85 files changed, 13615 insertions(+), 8494 deletions(-)."
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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